AuPd bimetallic nanoparticles decorated Cd0.5Zn0.5S photocatalysts with enhanced visible-light photocatalytic H2 production activity
AuPd bimetallic nanoparticles decorated Cd0.5Zn0.5S photocatalysts with enhanced visible-light photocatalytic H2 production activity
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DOI：
10.1016/j.ijhydene.2016.04.157
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发表时间：
2016-09
影响因子：
7.2
通讯作者：
Linen Wu;J. Gong;L. Ge;Changcun Han;Siman Fang;Yongji Xin;Yujing Li;Yan Lu
中科院分区：
文献类型：
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作者：
Linen Wu;J. Gong;L. Ge;Changcun Han;Siman Fang;Yongji Xin;Yujing Li;Yan Lu
本研究采用原位化学沉积法成功合成了新型AuPd双金属助催化剂修饰的Cd0.5Zn0.5S光催化剂。采用X射线衍射（XRD）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（DRS）、X射线光电子能谱（XPS）和表面光电压谱（SPV）对样品的物理和微观物理性质进行了表征。在可见光照射下，AuPd/Cd 0. 5 Zn 0. 5S复合催化剂表现出明显的光生电荷分离效率，从而显著提高了H2的产氢活性.当AuPd/Cd 0.5Zn 0.5S的质量分数为0.5%时，其催化活性最高，可见光下的放氢速率为3.65 mmol g−1h−1，约为纯Cd 0.5Zn 0.5S的12倍。光催化剂的光催化活性在9次循环光催化实验后仍保持稳定。系统地研究了金钯纳米粒子光催化增强的可能机理，为合成其他理想的光催化材料提供了新的思路。
In this study, novel AuPd bimetallic co-catalyst decorated Cd0.5Zn0.5S photocatalyst was successfully synthesized via an in-situ chemical deposition method. The physical as well as the photophysical properties of the as-obtained AuPd/Cd0.5Zn0.5S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV–vis diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPV). The AuPd bimetallic co-catalysts showed dramatic photo-generated charge separation efficiency in Cd0.5Zn0.5S sample, and thus significantly enhance the H2production activity under visible light irradiation. The AuPd/Cd0.5Zn0.5S sample with 0.5 wt% content had the highest catalytic activity, and the corresponding H2evolution rate is 3.65 mmol g−1h−1, which was about 12 times as that of pure Cd0.5Zn0.5S sample under visible light irradiation. The photocatalytic activity of the photocatalyst was stable even after 9 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of AuPd NPs was systematically investigated, which can provide a novel concept for the synthesis of other desirable photocatalytic materials.